direct3d11: Fixed missing rendering of solid primitives.

Fixes Bugzilla #4388.

src/render/direct3d11/SDL_render_d3d11.c

@@ -1565,6 +1565,8 @@ D3D11_QueueDrawPoints(SDL_Renderer * renderer, SDL_RenderCommand *cmd, const SDL
         return -1;
     }
 
+    cmd->data.draw.count = count;
+
     for (i = 0; i < count; i++) {
         verts->pos.x = points[i].x + 0.5f;
         verts->pos.y = points[i].y + 0.5f;
@@ -1595,6 +1597,8 @@ D3D11_QueueFillRects(SDL_Renderer * renderer, SDL_RenderCommand *cmd, const SDL_
         return -1;
     }
 
+    cmd->data.draw.count = count;
+
     for (i = 0; i < count; i++) {
         verts->pos.x = rects[i].x;
         verts->pos.y = rects[i].y;
@@ -1662,6 +1666,8 @@ D3D11_QueueCopy(SDL_Renderer * renderer, SDL_RenderCommand *cmd, SDL_Texture * t
         return -1;
     }
 
+    cmd->data.draw.count = 1;
+
     verts->pos.x = dstrect->x;
     verts->pos.y = dstrect->y;
     verts->pos.z = 0.0f;
@@ -1743,6 +1749,8 @@ D3D11_QueueCopyEx(SDL_Renderer * renderer, SDL_RenderCommand *cmd, SDL_Texture *
     miny = -center->y;
     maxy = dstrect->h - center->y;
 
+    cmd->data.draw.count = 1;
+
     verts->pos.x = minx;
     verts->pos.y = miny;
     verts->pos.z = 0.0f;